public SimpleXMLEventType(
EventTypeMetadata eventTypeMetadata,
ConfigurationCommonEventTypeXMLDOM configurationEventTypeXMLDOM,
EventBeanTypedEventFactory eventBeanTypedEventFactory,
EventTypeNameResolver eventTypeResolver,
XMLFragmentEventTypeFactory xmlEventTypeFactory)
: base(
eventTypeMetadata,
configurationEventTypeXMLDOM,
eventBeanTypedEventFactory,
eventTypeResolver,
xmlEventTypeFactory)
{
isResolvePropertiesAbsolute = configurationEventTypeXMLDOM.IsXPathResolvePropertiesAbsolute;
propertyGetterCache = new Dictionary<string, EventPropertyGetterSPI>();
// Set of namespace context for XPath expressions
var xPathNamespaceContext = new XPathNamespaceContext();
foreach (var entry in configurationEventTypeXMLDOM.NamespacePrefixes) {
xPathNamespaceContext.AddNamespace(entry.Key, entry.Value);
}
if (configurationEventTypeXMLDOM.DefaultNamespace != null) {
var defaultNamespace = configurationEventTypeXMLDOM.DefaultNamespace;
xPathNamespaceContext.SetDefaultNamespace(defaultNamespace);
// determine a default namespace prefix to use to construct XPath expressions from pure property names
defaultNamespacePrefix = null;
foreach (var entry in configurationEventTypeXMLDOM.NamespacePrefixes) {
if (entry.Value.Equals(defaultNamespace)) {
defaultNamespacePrefix = entry.Key;
break;
}
}
}
NamespaceContext = xPathNamespaceContext;
Initialize(
configurationEventTypeXMLDOM.XPathProperties.Values,
Collections.GetEmptyList<ExplicitPropertyDescriptor>());
}
/// <summary>
/// Return the xPath corresponding to the given property. The PropertyName String
/// may be simple, nested, indexed or mapped.
/// </summary>
/// <param name="propertyName">is the event property name</param>
/// <param name="namespace">is the default namespace</param>
/// <param name="schemaModel">is the schema model</param>
/// <param name="xPathContext">is the xpath factory instance to use</param>
/// <param name="rootElementName">is the name of the root element</param>
/// <param name="eventBeanTypedEventFactory">for type lookup and creation</param>
/// <param name="xmlEventType">the resolving type</param>
/// <param name="isAllowFragment">whether fragmenting is allowed</param>
/// <param name="defaultNamespace">default namespace</param>
/// <returns>
/// xpath expression
/// </returns>
/// <throws>EPException is there are XPath errors</throws>
public static EventPropertyGetterSPI GetXPathResolution(
string propertyName,
XPathNamespaceContext xPathContext,
string rootElementName,
string @namespace,
SchemaModel schemaModel,
EventBeanTypedEventFactory eventBeanTypedEventFactory,
BaseXMLEventType xmlEventType,
bool isAllowFragment,
string defaultNamespace)
{
if (Log.IsDebugEnabled)
{
Log.Debug("Determining XPath expression for property '" + propertyName + "'");
}
var ctx = new XPathNamespaceContext();
var namespaces = schemaModel.Namespaces;
string defaultNamespacePrefix = null;
for (var i = 0; i < namespaces.Count; i++)
{
var namespacePrefix = "n" + i;
ctx.AddNamespace(namespacePrefix, namespaces[i]);
if (defaultNamespace != null && defaultNamespace == namespaces[i])
{
defaultNamespacePrefix = namespacePrefix;
}
}
var property = PropertyParser.ParseAndWalkLaxToSimple(propertyName);
var isDynamic = property.IsDynamic;
var rootComplexElement = SchemaUtil.FindRootElement(schemaModel, @namespace, rootElementName);
var prefix = ctx.LookupPrefix(rootComplexElement.Namespace);
if (prefix == null)
{
prefix = "";
}
else
{
prefix += ':';
}
var xPathBuf = new StringBuilder();
xPathBuf.Append('/');
xPathBuf.Append(prefix);
if (rootElementName.StartsWith("//"))
{
xPathBuf.Append(rootElementName.Substring(2));
}
else
{
xPathBuf.Append(rootElementName);
}
var parentComplexElement = rootComplexElement;
Pair <string, XPathResultType> pair = null;
if (!(property is NestedProperty))
{
pair = MakeProperty(rootComplexElement, property, ctx, true, isDynamic, defaultNamespacePrefix);
if (pair == null)
{
throw new PropertyAccessException("Failed to locate property '" + propertyName + "' in schema");
}
xPathBuf.Append(pair.First);
}
else
{
var nestedProperty = (NestedProperty)property;
var indexLast = nestedProperty.Properties.Count - 1;
for (var i = 0; i < indexLast + 1; i++)
{
var isLast = i == indexLast;
var propertyNested = nestedProperty.Properties[i];
pair = MakeProperty(
parentComplexElement,
propertyNested,
ctx,
isLast,
isDynamic,
defaultNamespacePrefix);
if (pair == null)
{
throw new PropertyAccessException(
"Failed to locate property '" +
propertyName +
"' nested property part '" +
property.PropertyNameAtomic +
"' in schema");
}
var text = propertyNested.PropertyNameAtomic;
var obj = SchemaUtil.FindPropertyMapping(parentComplexElement, text);
if (obj is SchemaElementComplex)
{
parentComplexElement = (SchemaElementComplex)obj;
}
xPathBuf.Append(pair.First);
}
}
var xPath = xPathBuf.ToString();
if (ExecutionPathDebugLog.IsDebugEnabled && Log.IsDebugEnabled)
{
Log.Debug(".parse XPath for property '" + propertyName + "' is expression=" + xPath);
}
// Compile assembled XPath expression
if (Log.IsDebugEnabled)
{
Log.Debug(
"Compiling XPath expression '" +
xPath +
"' for property '" +
propertyName +
"' using namespace context :" +
ctx);
}
XPathExpression expr;
try {
expr = XPathExpression.Compile(xPath, ctx);
}
catch (XPathException e) {
var detail = "Error constructing XPath expression from property expression '" +
propertyName +
"' expression '" +
xPath +
"'";
if (e.Message != null)
{
throw new EPException(detail + " :" + e.Message, e);
}
throw new EPException(detail, e);
}
// get type
var item = property.GetPropertyTypeSchema(rootComplexElement);
if (item == null && !isDynamic)
{
return(null);
}
var resultType = isDynamic ? typeof(XmlNode) : SchemaUtil.ToReturnType(item);
FragmentFactory fragmentFactory = null;
if (isAllowFragment)
{
fragmentFactory = new FragmentFactoryDOMGetter(eventBeanTypedEventFactory, xmlEventType, propertyName);
}
return(new XPathPropertyGetter(
xmlEventType,
propertyName,
xPath,
expr,
pair.Second,
resultType,
fragmentFactory));
}
public SchemaXMLEventType(
EventTypeMetadata eventTypeMetadata,
ConfigurationCommonEventTypeXMLDOM config,
SchemaModel schemaModel,
string representsFragmentOfProperty,
string representsOriginalTypeName,
EventBeanTypedEventFactory eventBeanTypedEventFactory,
EventTypeNameResolver eventTypeResolver,
XMLFragmentEventTypeFactory xmlEventTypeFactory)
: base(
eventTypeMetadata,
config,
eventBeanTypedEventFactory,
eventTypeResolver,
xmlEventTypeFactory)
{
propertyGetterCache = new Dictionary<string, EventPropertyGetterSPI>();
SchemaModel = schemaModel;
rootElementNamespace = config.RootElementNamespace;
schemaModelRoot = SchemaUtil.FindRootElement(schemaModel, rootElementNamespace, RootElementName);
isPropertyExpressionXPath = config.IsXPathPropertyExpr;
RepresentsFragmentOfProperty = representsFragmentOfProperty;
RepresentsOriginalTypeName = representsOriginalTypeName;
// Set of namespace context for XPath expressions
var ctx = new XPathNamespaceContext();
if (config.DefaultNamespace != null) {
ctx.SetDefaultNamespace(config.DefaultNamespace);
}
foreach (var entry in config.NamespacePrefixes) {
ctx.AddNamespace(entry.Key, entry.Value);
}
NamespaceContext = ctx;
// add properties for the root element
IList<ExplicitPropertyDescriptor> additionalSchemaProps = new List<ExplicitPropertyDescriptor>();
// Add a property for each complex child element
foreach (SchemaElementComplex complex in schemaModelRoot.ComplexElements) {
var propertyName = complex.Name;
var returnType = typeof(XmlNode);
Type propertyComponentType = null;
if (complex.OptionalSimpleType != null) {
returnType = SchemaUtil.ToReturnType(complex);
if (returnType == typeof(string)) {
propertyComponentType = typeof(char);
}
}
if (complex.IsArray) {
returnType = typeof(XmlNode[]); // We use Node[] for arrays and NodeList for XPath-Expressions returning Nodeset
propertyComponentType = typeof(XmlNode);
}
var isFragment = false;
if (ConfigurationEventTypeXMLDOM.IsAutoFragment && !ConfigurationEventTypeXMLDOM.IsXPathPropertyExpr) {
isFragment = CanFragment(complex);
}
var getter = DoResolvePropertyGetter(propertyName, true);
var desc = new EventPropertyDescriptor(
propertyName,
returnType,
propertyComponentType,
false,
false,
complex.IsArray,
false,
isFragment);
var @explicit = new ExplicitPropertyDescriptor(desc, getter, false, null);
additionalSchemaProps.Add(@explicit);
}
// Add a property for each simple child element
foreach (var simple in schemaModelRoot.SimpleElements) {
var propertyName = simple.Name;
var returnType = SchemaUtil.ToReturnType(simple);
var componentType = GenericExtensions.GetComponentType(returnType);
var isIndexed = simple.IsArray || componentType != null;
var getter = DoResolvePropertyGetter(propertyName, true);
var desc = new EventPropertyDescriptor(
propertyName,
returnType,
componentType,
false,
false,
isIndexed,
false,
false);
var @explicit = new ExplicitPropertyDescriptor(desc, getter, false, null);
additionalSchemaProps.Add(@explicit);
}
// Add a property for each attribute
foreach (var attribute in schemaModelRoot.Attributes) {
var propertyName = attribute.Name;
var returnType = SchemaUtil.ToReturnType(attribute);
var componentType = GenericExtensions.GetComponentType(returnType);
var isIndexed = componentType != null;
var getter = DoResolvePropertyGetter(propertyName, true);
var desc = new EventPropertyDescriptor(
propertyName,
returnType,
componentType,
false,
false,
isIndexed,
false,
false);
var @explicit = new ExplicitPropertyDescriptor(desc, getter, false, null);
additionalSchemaProps.Add(@explicit);
}
// Finally add XPath properties as that may depend on the rootElementNamespace
Initialize(config.XPathProperties.Values, additionalSchemaProps);
}